William Brent Bell Director, Producer Ralph Ineson Jocelyn Abney Actor Tuppence Middleton Rebecca Holland Actor Matt Stokoe Henry Holland Actor Evie Templeton Grace Holland Actor Rosalind March Miri Tremlow Actor Anton Saunders George Furleigh Actor Alexa Goodall Bryony Furleigh Actor Catriona Yuill Callie Furleigh Actor Robert Goodman Graham Nash Actor Tom DeVille Screenwriter Nik Bower Producer Alison Brister Producer Laurie Cook Producer Deepak Nayar Producer Jason Newmark Producer James Tomlinson Producer Laura Brook Executive Producer Mark Fielding Executive Producer Ed Fraiman Executive Producer Yana Georgieva Executive Producer John Gleeson Executive Producer Stephen Kelliher Executive Producer Adam Nagel Executive Producer Oisín O'Neill Executive Producer Simon Rowling Cinematographer Andrew Leven Film Editing Brett Detar Original Music Alison Butler Production Design Steven Granger Art Director Clemency Cartwright Set Decoration Libby Irwin Costume Design